Dr.Ben
rrProfessor
Location: Richmond, VA, USA
My Posts This: Topic Forum | Honestly, you ought to go hunting here on RR for a Cline/OMI carb, because the stock PS will indeed try to go lean in the midrange is the high speed is set at all correctly (IE not too rich). I've seen a few lately for GOOD prices. If you'd like to run the engine as it is, I would suggest you change out the cateye for the one from the 60K nonpumped carb. You'll also want to add the midrange trimmer needle valve (which OPENS to make the midrange LEANER). When you run the engine, do not dare let it get too lean for anything longer than the briefest of time. If you do, I guarantee you it will ruin the piston and sleeve in barely a pass or two of the flight line. The engine is utterly intolerant of a lean run due to the tight clearance between the piston and sleeve. Tuned correctly with an OMI carb, they run well. I flew mine for two seasons.
Ben Minor
MRC Hirobo Helicopters and Team Futaba
Castle Creations
Morgan Fuels
Esprit Models |
